We are still looking for the very Top Talentand we would be delighted if you were to join our team More in detail UST is a multinational company based in North America certified as a Top Employer and Great Place to Work with more than 35000 employees worldwide and presence in over 35 countries. We are leaders in digital technology services providing large-scale technological solutions to major integral organizations. What we look for We are currently looking for an Application Responsible (AR) System Architect to join a strategic project in the banking sector working with a critical internal application based on the Actico Rules technology stack. Hybrid Model in Madrid (3x2)

Key Responsibilities

- Take end-to-end ownership of a critical business application ensuring availability stability and performance.
- Act as the main point of contact for operational technical and functional stakeholders.
- Perform application health checks performance tuning and capacity planning activities.
- Coordinate incident management change requests and risk assessments.
- Collaborate with development and infrastructure teams to resolve issues and deliver enhancements.
- Maintain accurate application documentation runbooks and service records.
- Drive application lifecycle activities including modernization rationalization or decommissioning initiatives.
- Validate technical requirements and non-functional requirements (NFRs).
- Collaborate with Enterprise Architects on solution design and architecture evolution.
- Ensure compliance with security standards cloud-first strategies and integration guidelines.
- Identify technical debt scalability challenges and modernization opportunities.
- Promote the adoption of reusable enterprise services and best practices.

Mandatory Requirements

- Degree in Computer Science Engineering or a related discipline.
- Proven experience supporting front-office and/or middle-office banking applications.
- Strong knowledge of
- Application monitoring tools




- Integration patterns (Web Services Message Queues File Transfer)
- Database schema design SQL query optimization and log analysis
- Git version control
- Jira or similar ticketing tools

- Practical understanding of enterprise architecture principles and secure design patterns.
- Hands‑on experience with Java-based systems and development environments.
- Experience with Oracle Database and SQL.
- Knowledge of Actico platform operations.
- Strong analytical and problem‑solving skills.
- Excellent communication and stakeholder management capabilities.
- Ownership mindset proactive attitude and teamwork orientation.
- Professional English communication skills

Nice to Have

- Experience within Compliance or Regulatory domains.
- Certifications or training related to Visual Rules / Actico Rules.
- Experience in cloud migration initiatives.
- Knowledge of observability API design and modern integration architectures.
- German language skills.

What can we offer

- 23 days of Annual Leave plus the 24th and 31st of December as discretionary days
- Numerous benefits (Health Care Plan Internet Connectivity Life and Accident Insurances).
- Retribución Flexible Program (Meals Kindergarten Transport Online English Lessons Health Care Plan)
- Free access to several training platforms.
- Professional stability and career plans.
- UST also compensates referrals from which you could benefit when you refer professionals.
- The option to pick between 12 or 14 payments along the year.
- Real Work Life Balance measures (flexibility WFH or remote work policy compacted hours during summertime)
- UST Club Platform discounts and gym access discounts.

UST is waiting for you At UST we are committed to equal opportunities in our selection processes and do not discriminate based on race gender disability age religion sexual orientation or nationality. We have a special commitment to Disability Inclusion and we are interested in hiring professionals with a disability certificate.

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📌 Application Responsible System Architect (Madrid)
🏢 Tamarind Intelligence
📍 Madrid